摘要
Flotation is often employed to separate valuable natural minerals and gangue minerals.However,few studies have been conducted on artificial mineral flotation.Anosovite,the primary mineral in titanium slag,is a typical artificial mineral that can be enriched by flotation.In the present work,flotation behavior and adsorption mechanism of anosovite in salicylhydroxamic acid(SHA)solution were studied.The influence of pH and SHA dosage on anosovite flotability was investigated.Micro-flotation test results show that a pH range of 7–8.5 is available for SHA to collect anosovite.A maximum recovery of 93.26%can be obtained with SHA dosage of only 4×10.5 mol/L.In addition,TOC,zeta potential,FTIR,SEM-EDS,and XPS analyses were used to study the adsorption mechanism.Results demonstrated that SHA adsorption is governed by chemisorption.XPS studies further suggested that chemical adsorption occurred at the Ti sites on the anosovite surface.
浮选经常被应用于分离天然的有用矿物和脉石矿物,但是很少有研究聚焦于人造矿物的浮选。黑钛石作为钛渣中的主要矿物,是一种典型的人造矿物,可以通过浮选来富集。本文研究了黑钛石在水杨羟肟酸溶液中的浮选行为及吸附机理,重点研究了pH和水杨羟肟酸用量对黑钛石浮选性能的影响。纯矿物浮选试验结果表明,以水杨羟肟酸为捕收剂,黑钛石最佳的浮选区间是7<pH<8.5,当水杨羟肟酸的用量只有4×10^(-5)mol/L时,黑钛石的回收率可以达到93.26%。另外,采用总有机碳分析、zeta电位、红外光谱分析、扫描电镜能谱分析、X射线光电子能谱分析等测试手段研究吸附机理。研究结果表明水杨羟肟酸在黑钛石表面是化学吸附,X射线光电子能谱分析显示化学吸附发生在Ti位点上。
作者
WANG Xue-feng
WANG Yi-jie
WEN Shu-ming
YIN Peng-gang
王雪峰;王伊杰;文书明;殷鹏刚(School of Chemistry and Environment, Beijing University of Aeronautics and Astronautics;Chinese Academy of Natural Resources Economics;State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology)
基金
Project(51090385) supported by the Major Program of the National Natural Science Foundation of China
Projects(121102000000160001,121102000000170013) supported by the Ministry of Land and Resources Department Budget,China
Project(DD20179133) supported by the Geological Survey and Evaluation Project of China
Project(2018M641439) supported by China Postdoctoral Science Foundation
